Record of cold starting tests for a 5.B.IV chassis using Duckham's and Castrol oils.
| Identifier | ExFiles\Box 151\3\ scan0342 | |
| Date | 10th December 1937 guessed | |
| 5.B.IV CHASSIS. COLD STARTING TESTS. DUCKHAM'S N.P.XX. Room Temp. | Oil in Sump. | Remarks | Starts every 20-30 mins. -5°F | 32°F | 3 secs. started | R.P.M. 75 -13° | 23°F | 4 secs. threw out 2 " started | R.P.M. 50 -13° | 12°F | 7 secs. threw out 2 " Fired for 2 secs. 2 " threw out 2 " threw out 2 " started | R.P.M. 30 -11° | 8°F | 15 secs. threw out 8 " started & picked up evenly after 3 " 4 secs. | R.P.M. 30 CASTROL X.L. 10°F | 32°F | 5 secs. threw out 3 " Started and after 2 secs. ran evenly. | R.P.M. 75 0°F | 23°F | 5 secs. threw out 2 " started & after 2 secs. ran evenly. | R.P.M. 60 -8° | 14°F | 10 secs. threw out 7 " " 7 " fired for 13 secs. 3 " " 9 " started & after 20 secs. ran evenly. | R.P.M. 50 | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).